org.modeshape.jcr.query.validate.ImmutableKey Maven / Gradle / Ivy
/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.jcr.query.validate;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.modeshape.jcr.query.validate.Schemata.Column;
import org.modeshape.jcr.query.validate.Schemata.Key;
/**
*
*/
public class ImmutableKey implements Key {
private final Set columns;
protected ImmutableKey( Iterable columns ) {
assert columns != null;
Set columnSet = new HashSet();
for (Column column : columns) {
if (column != null) columnSet.add(column);
}
assert !columnSet.isEmpty();
this.columns = Collections.unmodifiableSet(columnSet);
}
protected ImmutableKey( Column... columns ) {
assert columns != null;
assert columns.length > 0;
Set columnSet = new HashSet();
for (Column column : columns) {
if (column != null) columnSet.add(column);
}
assert !columnSet.isEmpty();
this.columns = Collections.unmodifiableSet(columnSet);
}
@Override
public Set getColumns() {
return columns;
}
@Override
public boolean hasColumns( Column... columns ) {
Set keyColumns = new HashSet(this.columns);
for (Column expected : columns) {
if (!keyColumns.remove(expected)) return false;
}
return keyColumns.isEmpty();
}
@Override
public boolean hasColumns( Iterable columns ) {
Set keyColumns = new HashSet(this.columns);
for (Column expected : columns) {
if (!keyColumns.remove(expected)) return false;
}
return keyColumns.isEmpty();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
boolean first = true;
sb.append('[');
for (Column column : columns) {
if (first) first = false;
else sb.append(", ");
sb.append(column);
}
sb.append(']');
return sb.toString();
}
}
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